TR(beta)1 protein is preferentially expressed in the pericentral zone of rat liver and exhibits marked diurnal variation

B. Zandieh Doulabi, M. ter Platvoet-Schiphorst, H.C. van Beeren, W.T. Labruyëre, W.H. Lamers, E. Fliers, O. Bakker, W.M. Wiersinga

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

TR(beta)1 protein is preferentially expressed in the pericentral zone of rat liver and exhibits marked diurnal variation.

Zandieh Doulabi B, Platvoet-ter Schiphorst M, van Beeren HC, Labruyere WT, Lamers WH, Fliers E, Bakker O, Wiersinga WM.

Department of Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands.

We investigated the distribution and diurnal variation of TR(beta)1 protein expression in liver with specific antibodies against TR(beta)1. Immunohistochemistry showed a zonal distribution of TR(beta)1 with maximum expression in the pericentral zone matching some known T(3)-responsive enzyme activities in the liver, such as glutamine synthetase, cholesterol 7alpha- hydroxylase, and spot 14. Combining immunohistochemistry and image analysis we found and quantified the same zonal distribution for 5'-deiodinase type 1 as for TR(beta)1. Western blot analysis revealed a profound diurnal variation for TR(beta)1 protein expression, with highest levels at the beginning of the dark period. TR(beta)1 diurnal variation partly overlaps with the T(3)-responsive genes, cholesterol 7alpha-hydroxylase and spot 14. Furthermore, TR(beta)1 distribution along the porto-central axis does not change during the day, indicating that the zonal expression of TR(beta)1 is stable. This is the first time that zonal distribution in liver has been demonstrated for a member of the nuclear receptor family. This finding together with the observed diurnal rhythm has major implications for interpreting and timing experiments concerning the TR and its downstream actions in liver
Original languageEnglish
Pages (from-to)979-984
Number of pages5
JournalEndocrinology
Volume143
Issue number3
DOIs
Publication statusPublished - 1 Jan 2002

Cite this

Zandieh Doulabi, B., ter Platvoet-Schiphorst, M., van Beeren, H. C., Labruyëre, W. T., Lamers, W. H., Fliers, E., Bakker, O., & Wiersinga, W. M. (2002). TR(beta)1 protein is preferentially expressed in the pericentral zone of rat liver and exhibits marked diurnal variation. Endocrinology, 143(3), 979-984. https://doi.org/10.1210/endo.143.3.8706